Dyfyniad APA

 Mascull, B. (2006).  Market leader: Upper intermediate business english Teacher''s book.  Longmans.

Dyfyniad Arddull Chicago

 Mascull, Bill.  Market Leader: Upper Intermediate Business English Teacher''s Book.  Longmans, 2006.

Dyfyniad MLA

 Mascull, Bill.  Market Leader: Upper Intermediate Business English Teacher''s Book.  Longmans, 2006.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.